<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app"></div>
</body>
</html>
<script src="./vue.js"></script>
<script>
  new Vue({
    el: "#app",
    data: {
      str: "message"
    },
    beforeCreate() {
      console.log("beforeCreate", this.$el, this.$data);
    },
    created() {
      console.log("created", this.$el, this.$data);
    },
    beforeMount() {
      console.log("beforeMount", this.$el, this.$data);
    },
    mounted() {
      console.log("mounted", this.$el, this.$data);
    }
    
  });
</script>